diff --git a/.forgejo/workflows/lint.yaml b/.forgejo/workflows/lint.yaml
index d29fb6e..a867c13 100644
--- a/.forgejo/workflows/lint.yaml
+++ b/.forgejo/workflows/lint.yaml
@@ -10,7 +10,7 @@ jobs:
     name: Ansible Lint
     runs-on: docker
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
       - name: Install pip
         run: |
           apt update
@@ -24,7 +24,7 @@ jobs:
       # work in our environmnet.
       # Rather manually setup python (pip) before instead.
       - name: Run ansible-lint
-        uses: https://github.com/ansible/ansible-lint@v25.11.0
+        uses: https://github.com/ansible/ansible-lint@d7cd7cfa2469536527aceaef9ef2ec6f2fb331cb # v25.9.2
         with:
           setup_python: "false"
           requirements_file: "requirements.yml"
diff --git a/inventories/chaosknoten/host_vars/cloud.yaml b/inventories/chaosknoten/host_vars/cloud.yaml
index b6cf771..0cbcd4d 100644
--- a/inventories/chaosknoten/host_vars/cloud.yaml
+++ b/inventories/chaosknoten/host_vars/cloud.yaml
@@ -1,11 +1,11 @@
 # renovate: datasource=docker depName=git.hamburg.ccc.de/ccchh/oci-images/nextcloud
 nextcloud__version: 32
 # renovate: datasource=docker depName=docker.io/library/postgres
-nextcloud__postgres_version: 15.15
+nextcloud__postgres_version: 15.14
 nextcloud__fqdn: cloud.hamburg.ccc.de
 nextcloud__data_dir: /data/nextcloud
 nextcloud__extra_configuration: "{{ lookup('ansible.builtin.template', 'resources/chaosknoten/cloud/nextcloud/extra_configuration.config.php.j2') }}"
 nextcloud__use_custom_new_user_skeleton: true
 nextcloud__custom_new_user_skeleton_directory: "resources/chaosknoten/cloud/nextcloud/new_user_skeleton_directory/"
-nextcloud__proxy_protocol_reverse_proxy_ip: "2a00:14b0:4200:3000:125::1"
+nextcloud__proxy_protocol_reverse_proxy_ip: 172.31.17.140
 nextcloud__certbot_acme_account_email_address: le-admin@hamburg.ccc.de
diff --git a/inventories/chaosknoten/host_vars/grafana.yaml b/inventories/chaosknoten/host_vars/grafana.yaml
index ecc942c..2e3672e 100644
--- a/inventories/chaosknoten/host_vars/grafana.yaml
+++ b/inventories/chaosknoten/host_vars/grafana.yaml
@@ -53,6 +53,7 @@ nginx__configurations:
   - name: metrics.hamburg.ccc.de
     content: "{{ lookup('ansible.builtin.file', 'resources/chaosknoten/grafana/nginx/metrics.hamburg.ccc.de.conf') }}"
 
+
 alloy_config: |
   prometheus.remote_write "default" {
     endpoint {
diff --git a/inventories/chaosknoten/host_vars/netbox.yaml b/inventories/chaosknoten/host_vars/netbox.yaml
index 3be8bdd..60dd94a 100644
--- a/inventories/chaosknoten/host_vars/netbox.yaml
+++ b/inventories/chaosknoten/host_vars/netbox.yaml
@@ -1,5 +1,5 @@
 # renovate: datasource=github-releases depName=netbox packageName=netbox-community/netbox
-netbox__version: "v4.4.6"
+netbox__version: "v4.4.5"
 netbox__config: "{{ lookup('ansible.builtin.template', 'resources/chaosknoten/netbox/netbox/configuration.py.j2') }}"
 netbox__custom_pipeline_oidc_group_and_role_mapping: true
 
diff --git a/inventories/chaosknoten/host_vars/router.yaml b/inventories/chaosknoten/host_vars/router.yaml
deleted file mode 100644
index 134d29f..0000000
--- a/inventories/chaosknoten/host_vars/router.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-systemd_networkd__config_dir: 'resources/chaosknoten/router/systemd_networkd/'
-nftables__config: "{{ lookup('ansible.builtin.file', 'resources/chaosknoten/router/nftables/nftables.conf') }}"
diff --git a/inventories/chaosknoten/hosts.yaml b/inventories/chaosknoten/hosts.yaml
index 1028deb..b9e6358 100644
--- a/inventories/chaosknoten/hosts.yaml
+++ b/inventories/chaosknoten/hosts.yaml
@@ -7,13 +7,13 @@ all:
     chaosknoten:
       ansible_host: chaosknoten.hamburg.ccc.de
     cloud:
-      ansible_host: cloud.hosts.hamburg.ccc.de
+      ansible_host: cloud-intern.hamburg.ccc.de
       ansible_user: chaos
-      ansible_ssh_common_args: -J ssh://chaos@router.hamburg.ccc.de
+      ansible_ssh_common_args: -J ssh://chaos@public-reverse-proxy.hamburg.ccc.de
     eh22-wiki:
-      ansible_host: eh22-wiki.hosts.hamburg.ccc.de
+      ansible_host: eh22-wiki-intern.hamburg.ccc.de
       ansible_user: chaos
-      ansible_ssh_common_args: -J ssh://chaos@router.hamburg.ccc.de
+      ansible_ssh_common_args: -J ssh://chaos@public-reverse-proxy.hamburg.ccc.de
     grafana:
       ansible_host: grafana-intern.hamburg.ccc.de
       ansible_user: chaos
@@ -23,9 +23,9 @@ all:
       ansible_user: chaos
       ansible_ssh_common_args: -J ssh://chaos@public-reverse-proxy.hamburg.ccc.de
     keycloak:
-      ansible_host: keycloak.hosts.hamburg.ccc.de
+      ansible_host: keycloak-intern.hamburg.ccc.de
       ansible_user: chaos
-      ansible_ssh_common_args: -J ssh://chaos@router.hamburg.ccc.de
+      ansible_ssh_common_args: -J ssh://chaos@public-reverse-proxy.hamburg.ccc.de
     lists:
       ansible_host: lists.hamburg.ccc.de
       ansible_user: chaos
@@ -37,13 +37,13 @@ all:
       ansible_user: chaos
       ansible_ssh_common_args: -J ssh://chaos@public-reverse-proxy.hamburg.ccc.de
     onlyoffice:
-      ansible_host: onlyoffice.hosts.hamburg.ccc.de
+      ansible_host: onlyoffice-intern.hamburg.ccc.de
       ansible_user: chaos
-      ansible_ssh_common_args: -J ssh://chaos@router.hamburg.ccc.de
+      ansible_ssh_common_args: -J ssh://chaos@public-reverse-proxy.hamburg.ccc.de
     pad:
-      ansible_host: pad.hosts.hamburg.ccc.de
+      ansible_host: pad-intern.hamburg.ccc.de
       ansible_user: chaos
-      ansible_ssh_common_args: -J ssh://chaos@router.hamburg.ccc.de
+      ansible_ssh_common_args: -J ssh://chaos@public-reverse-proxy.hamburg.ccc.de
     pretalx:
       ansible_host: pretalx-intern.hamburg.ccc.de
       ansible_user: chaos
@@ -51,13 +51,10 @@ all:
     public-reverse-proxy:
       ansible_host: public-reverse-proxy.hamburg.ccc.de
       ansible_user: chaos
-    router:
-      ansible_host: router.hamburg.ccc.de
-      ansible_user: chaos
     wiki:
-      ansible_host: wiki.hosts.hamburg.ccc.de
+      ansible_host: wiki-intern.hamburg.ccc.de
       ansible_user: chaos
-      ansible_ssh_common_args: -J ssh://chaos@router.hamburg.ccc.de
+      ansible_ssh_common_args: -J ssh://chaos@public-reverse-proxy.hamburg.ccc.de
     zammad:
       ansible_host: zammad-intern.hamburg.ccc.de
       ansible_user: chaos
@@ -91,19 +88,12 @@ base_config_hosts:
     pad:
     pretalx:
     public-reverse-proxy:
-    router:
     tickets:
     wiki:
     zammad:
     ntfy:
     sunders:
     renovate:
-systemd_networkd_hosts:
-  hosts:
-    router:
-nftables_hosts:
-  hosts:
-    router:
 docker_compose_hosts:
   hosts:
     ccchoir:
@@ -183,7 +173,6 @@ infrastructure_authorized_keys_hosts:
     pad:
     pretalx:
     public-reverse-proxy:
-    router:
     wiki:
     zammad:
     ntfy:
diff --git a/inventories/z9/host_vars/yate.yaml b/inventories/z9/host_vars/yate.yaml
index fecacb1..d2dc518 100644
--- a/inventories/z9/host_vars/yate.yaml
+++ b/inventories/z9/host_vars/yate.yaml
@@ -6,3 +6,4 @@ docker_compose__configuration_files:
     content: "{{ lookup('ansible.builtin.template', 'resources/z9/yate/docker_compose/regexroute.conf.j2') }}"
   - name: regfile.conf
     content: "{{ lookup('ansible.builtin.template', 'resources/z9/yate/docker_compose/regfile.conf.j2') }}"
+docker_compose__restart_cmd: "exec yate sh -c 'kill -1 1'"
diff --git a/inventories/z9/hosts.yaml b/inventories/z9/hosts.yaml
index 9f4a692..9d5bb09 100644
--- a/inventories/z9/hosts.yaml
+++ b/inventories/z9/hosts.yaml
@@ -4,7 +4,7 @@ all:
       ansible_host: authoritative-dns.z9.ccchh.net
       ansible_user: chaos
     dooris:
-      ansible_host: dooris.z9.ccchh.net
+      ansible_host: 10.31.208.201
       ansible_user: chaos
     light:
       ansible_host: light.z9.ccchh.net
diff --git a/playbooks/deploy.yaml b/playbooks/deploy.yaml
index f416b91..d7bacac 100644
--- a/playbooks/deploy.yaml
+++ b/playbooks/deploy.yaml
@@ -4,16 +4,6 @@
   roles:
     - base_config
 
-- name: Ensure systemd-networkd config deployment on systemd_networkd_hosts
-  hosts: systemd_networkd_hosts
-  roles:
-    - systemd_networkd
-
-- name: Ensure nftables deployment on nftables_hosts
-  hosts: nftables_hosts
-  roles:
-    - nftables
-
 - name: Ensure deployment of infrastructure authorized keys
   hosts: infrastructure_authorized_keys_hosts
   roles:
diff --git a/renovate.json b/renovate.json
index 711c627..7e604c1 100644
--- a/renovate.json
+++ b/renovate.json
@@ -1,17 +1,13 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
-    "config:recommended",
-    // Parts from config:best-practices:
-    // https://docs.renovatebot.com/presets-config/#configbest-practices
-    ":configMigration",
-    "abandonments:recommended",
-    "security:minimumReleaseAgeNpm",
-
+    "config:recommended", // Included in config:best-practices anyway, but added for clarity.
+    "config:best-practices",
     ":ignoreUnstable",
     ":disableRateLimiting",
     ":rebaseStalePrs",
-    ":label(renovate)"
+    ":label(renovate)",
+    "group:allDigest"
   ],
   "semanticCommits": "disabled",
   "packageRules": [
@@ -32,6 +28,12 @@
       "matchDatasources": ["docker"],
       "matchPackageNames": ["docker.io/pretix/standalone"],
       "versioning": "regex:^(?<major>\\d+\\.\\d+)(?:\\.(?<minor>\\d+))$"
+    },
+    // Since Forgejo seems to clean up older tag versions, so older digests, disable digest pinning for our images.
+    {
+      "matchDatasources": ["docker"],
+      "matchPackageNames": ["git.hamburg.ccc.de/*"],
+      "pinDigests": false
     }
   ],
   "customManagers": [
diff --git a/requirements.yml b/requirements.yml
index 6011bda..e5538cc 100644
--- a/requirements.yml
+++ b/requirements.yml
@@ -6,6 +6,3 @@ collections:
   - name: community.sops
     version: ">=2.2.4"
     source: https://galaxy.ansible.com
-  - name: community.docker
-    version: ">=5.0.0"
-    source: https://galaxy.ansible.com
diff --git a/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2 b/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2
index c2108d8..ffe491b 100644
--- a/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2
@@ -3,7 +3,7 @@
 
 services:
   database:
-    image: docker.io/library/mariadb:11
+    image: docker.io/library/mariadb:11@sha256:ae6119716edac6998ae85508431b3d2e666530ddf4e94c61a10710caec9b0f71
     environment:
       - "MARIADB_DATABASE=wordpress"
       - "MARIADB_ROOT_PASSWORD={{ secret__mariadb_root_password }}"
@@ -17,7 +17,7 @@ services:
     restart: unless-stopped
 
   app:
-    image: docker.io/library/wordpress:6-php8.1
+    image: docker.io/library/wordpress:6-php8.1@sha256:75f79f9c45a587b283e47fd21c6e51077d0c9dbbba529377faaa0c28d5b8f5a4
     environment:
       - "WORDPRESS_DB_HOST=database"
       - "WORDPRESS_DB_NAME=wordpress"
diff --git a/resources/chaosknoten/eh22-wiki/nginx/eh22.easterhegg.eu.conf b/resources/chaosknoten/eh22-wiki/nginx/eh22.easterhegg.eu.conf
index 8c801fe..d3ed959 100644
--- a/resources/chaosknoten/eh22-wiki/nginx/eh22.easterhegg.eu.conf
+++ b/resources/chaosknoten/eh22-wiki/nginx/eh22.easterhegg.eu.conf
@@ -3,12 +3,11 @@
 server {
     # Listen on a custom port for the proxy protocol.
     listen 8443 ssl http2 proxy_protocol;
-    listen [::]:8443 ssl http2 proxy_protocol;
     # Make use of the ngx_http_realip_module to set the $remote_addr and
     # $remote_port to the client address and client port, when using proxy
     # protocol.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 2a00:14b0:4200:3000:125::1;
+    set_real_ip_from 172.31.17.140;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
diff --git a/resources/chaosknoten/grafana/docker_compose/compose.yaml.j2 b/resources/chaosknoten/grafana/docker_compose/compose.yaml.j2
index 2d598f9..d739b2f 100644
--- a/resources/chaosknoten/grafana/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/grafana/docker_compose/compose.yaml.j2
@@ -2,13 +2,12 @@
 services:
 
   prometheus:
-    image: docker.io/prom/prometheus:v3.7.3
+    image: docker.io/prom/prometheus:v3.7.2@sha256:23031bfe0e74a13004252caaa74eccd0d62b6c6e7a04711d5b8bf5b7e113adc7
     container_name: prometheus
     command:
       - '--config.file=/etc/prometheus/prometheus.yml'
       - '--web.enable-remote-write-receiver'
       - '--enable-feature=promql-experimental-functions'
-      - '--storage.tsdb.retention.time=28d'
     ports:
       - 9090:9090
     restart: unless-stopped
@@ -19,7 +18,7 @@ services:
       - prom_data:/prometheus
 
   alertmanager:
-    image: docker.io/prom/alertmanager:v0.29.0
+    image: docker.io/prom/alertmanager:v0.28.1@sha256:27c475db5fb156cab31d5c18a4251ac7ed567746a2483ff264516437a39b15ba
     container_name: alertmanager
     command:
       - '--config.file=/etc/alertmanager/alertmanager.yaml'
@@ -32,7 +31,7 @@ services:
       - alertmanager_data:/alertmanager
 
   grafana:
-    image: docker.io/grafana/grafana:12.3.0
+    image: docker.io/grafana/grafana:12.2.1@sha256:35c41e0fd0295f5d0ee5db7e780cf33506abfaf47686196f825364889dee878b
     container_name: grafana
     ports:
       - 3000:3000
@@ -46,7 +45,7 @@ services:
       - graf_data:/var/lib/grafana
 
   pve-exporter:
-    image: docker.io/prompve/prometheus-pve-exporter:3.5.5
+    image: docker.io/prompve/prometheus-pve-exporter:3.5.5@sha256:79a5598906697b1a5a006d09f0200528a77c6ff1568faf018539ac65824454df
     container_name: pve-exporter
     ports:
       - 9221:9221
@@ -59,7 +58,7 @@ services:
       - /dev/null:/etc/prometheus/pve.yml
 
   loki:
-    image: docker.io/grafana/loki:3.6.0
+    image: docker.io/grafana/loki:3.5.7@sha256:0eaee7bf39cc83aaef46914fb58f287d4f4c4be6ec96b86c2ed55719a75e49c8
     container_name: loki
     ports:
       - 13100:3100
@@ -70,7 +69,7 @@ services:
       - loki_data:/var/loki
 
   ntfy-alertmanager-ccchh-critical:
-    image: docker.io/xenrox/ntfy-alertmanager:0.5.0
+    image: docker.io/xenrox/ntfy-alertmanager:0.5.0@sha256:5fea88db3bf0257d98c007ab0c4ef064c6d67d7b7ceead7d6956dfa0a5cb333b
     container_name: ntfy-alertmanager-ccchh-critical
     volumes:
       - ./configs/ntfy-alertmanager-ccchh-critical:/etc/ntfy-alertmanager/config
@@ -79,7 +78,7 @@ services:
     restart: unless-stopped
 
   ntfy-alertmanager-fux-critical:
-    image: docker.io/xenrox/ntfy-alertmanager:0.5.0
+    image: docker.io/xenrox/ntfy-alertmanager:0.5.0@sha256:5fea88db3bf0257d98c007ab0c4ef064c6d67d7b7ceead7d6956dfa0a5cb333b
     container_name: ntfy-alertmanager-fux-critical
     volumes:
       - ./configs/ntfy-alertmanager-fux-critical:/etc/ntfy-alertmanager/config
@@ -88,7 +87,7 @@ services:
     restart: unless-stopped
 
   ntfy-alertmanager-ccchh:
-    image: docker.io/xenrox/ntfy-alertmanager:0.5.0
+    image: docker.io/xenrox/ntfy-alertmanager:0.5.0@sha256:5fea88db3bf0257d98c007ab0c4ef064c6d67d7b7ceead7d6956dfa0a5cb333b
     container_name: ntfy-alertmanager-ccchh
     volumes:
       - ./configs/ntfy-alertmanager-ccchh:/etc/ntfy-alertmanager/config
@@ -97,7 +96,7 @@ services:
     restart: unless-stopped
 
   ntfy-alertmanager-fux:
-    image: docker.io/xenrox/ntfy-alertmanager:0.5.0
+    image: docker.io/xenrox/ntfy-alertmanager:0.5.0@sha256:5fea88db3bf0257d98c007ab0c4ef064c6d67d7b7ceead7d6956dfa0a5cb333b
     container_name: ntfy-alertmanager-fux
     volumes:
       - ./configs/ntfy-alertmanager-fux:/etc/ntfy-alertmanager/config
diff --git a/resources/chaosknoten/keycloak/docker_compose/compose.yaml.j2 b/resources/chaosknoten/keycloak/docker_compose/compose.yaml.j2
index a260ab1..d91a254 100644
--- a/resources/chaosknoten/keycloak/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/keycloak/docker_compose/compose.yaml.j2
@@ -46,7 +46,7 @@ services:
       - "8080:8080"
 
   db:
-    image: docker.io/library/postgres:15.15
+    image: docker.io/library/postgres:15.14@sha256:424e79b81868f5fc5cf515eaeac69d288692ebcca7db86d98f91b50d4bce64bb
     restart: unless-stopped
     networks:
       - keycloak
diff --git a/resources/chaosknoten/keycloak/nginx/id.hamburg.ccc.de.conf b/resources/chaosknoten/keycloak/nginx/id.hamburg.ccc.de.conf
index 939e1da..303b052 100644
--- a/resources/chaosknoten/keycloak/nginx/id.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/keycloak/nginx/id.hamburg.ccc.de.conf
@@ -4,12 +4,11 @@
 server {
     # Listen on a custom port for the proxy protocol.
     listen 8443 ssl http2 proxy_protocol;
-    listen [::]:8443 ssl http2 proxy_protocol;
     # Make use of the ngx_http_realip_module to set the $remote_addr and
     # $remote_port to the client address and client port, when using proxy
     # protocol.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 2a00:14b0:4200:3000:125::1;
+    set_real_ip_from 172.31.17.140;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
diff --git a/resources/chaosknoten/keycloak/nginx/invite.hamburg.ccc.de.conf b/resources/chaosknoten/keycloak/nginx/invite.hamburg.ccc.de.conf
index de1e9d6..4a9cfe6 100644
--- a/resources/chaosknoten/keycloak/nginx/invite.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/keycloak/nginx/invite.hamburg.ccc.de.conf
@@ -4,12 +4,11 @@
 server {
     # Listen on a custom port for the proxy protocol.
     listen 8443 ssl http2 proxy_protocol;
-    listen [::]:8443 ssl http2 proxy_protocol;
     # Make use of the ngx_http_realip_module to set the $remote_addr and
     # $remote_port to the client address and client port, when using proxy
     # protocol.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 2a00:14b0:4200:3000:125::1;
+    set_real_ip_from 172.31.17.140;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
diff --git a/resources/chaosknoten/keycloak/nginx/keycloak-admin.hamburg.ccc.de.conf b/resources/chaosknoten/keycloak/nginx/keycloak-admin.hamburg.ccc.de.conf
index cd56b98..2b0d919 100644
--- a/resources/chaosknoten/keycloak/nginx/keycloak-admin.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/keycloak/nginx/keycloak-admin.hamburg.ccc.de.conf
@@ -7,13 +7,12 @@ server {
     ##listen [::]:443 ssl http2;
 
     # Listen on a custom port for the proxy protocol.
-    listen 8443 ssl http2 proxy_protocol;
-    listen [::]:8443 ssl http2 proxy_protocol;
+    listen 8444 ssl http2 proxy_protocol;
     # Make use of the ngx_http_realip_module to set the $remote_addr and
     # $remote_port to the client address and client port, when using proxy
     # protocol.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 2a00:14b0:4200:3000:125::1;
+    set_real_ip_from 172.31.17.140;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
diff --git a/resources/chaosknoten/lists/docker_compose/compose.yaml b/resources/chaosknoten/lists/docker_compose/compose.yaml
index cdfd70a..8537ead 100644
--- a/resources/chaosknoten/lists/docker_compose/compose.yaml
+++ b/resources/chaosknoten/lists/docker_compose/compose.yaml
@@ -1,7 +1,7 @@
 services:
   mailman-core:
     restart: unless-stopped
-    image: docker.io/maxking/mailman-core:0.5 # Use a specific version tag (tag latest is not published)
+    image: docker.io/maxking/mailman-core:0.5@sha256:cb8e412bb18d74480f996da68f46e92473b6103995e71bc5aeba139b255cc3d2 # Use a specific version tag (tag latest is not published)
     container_name: mailman-core
     hostname: mailman-core
     volumes:
@@ -25,7 +25,7 @@ services:
 
   mailman-web:
     restart: unless-stopped
-    image: docker.io/maxking/mailman-web:0.5 # Use a specific version tag (tag latest is not published)
+    image: docker.io/maxking/mailman-web:0.5@sha256:014726db85586fb53541f66f6ce964bf07e939791cfd5ffc796cd6d243696a18 # Use a specific version tag (tag latest is not published)
     container_name: mailman-web
     hostname: mailman-web
     depends_on:
@@ -56,7 +56,7 @@ services:
       - POSTGRES_DB=mailmandb
       - POSTGRES_USER=mailman
       - POSTGRES_PASSWORD=wvQjbMRnwFuxGEPz
-    image: docker.io/library/postgres:12-alpine
+    image: docker.io/library/postgres:12-alpine@sha256:7c8f4870583184ebadf7f17a6513620aac5f365a7938dc6a6911c1d5df2f481a
     volumes:
       - /opt/mailman/database:/var/lib/postgresql/data
     networks:
diff --git a/resources/chaosknoten/ntfy/docker_compose/compose.yaml.j2 b/resources/chaosknoten/ntfy/docker_compose/compose.yaml.j2
index 50df05d..07e8d9e 100644
--- a/resources/chaosknoten/ntfy/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/ntfy/docker_compose/compose.yaml.j2
@@ -1,7 +1,7 @@
 ---
 services:
   ntfy:
-    image: docker.io/binwiederhier/ntfy:v2.15.0
+    image: docker.io/binwiederhier/ntfy:v2.14.0@sha256:5a051798d14138c3ecb12c038652558ab6a077e1aceeb867c151cbf5fa8451ef
     container_name: ntfy
     command:
       - serve
diff --git a/resources/chaosknoten/onlyoffice/docker_compose/compose.yaml.j2 b/resources/chaosknoten/onlyoffice/docker_compose/compose.yaml.j2
index f3444ac..5c9a42a 100644
--- a/resources/chaosknoten/onlyoffice/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/onlyoffice/docker_compose/compose.yaml.j2
@@ -4,7 +4,7 @@
 
 services:
   onlyoffice:
-    image: docker.io/onlyoffice/documentserver:9.1.0
+    image: docker.io/onlyoffice/documentserver:9.1.0@sha256:34b92f4a67bfd939bd6b75893e8217556e3b977f81e49472f7e28737b741ba1d
     restart: unless-stopped
     volumes:
       - "./onlyoffice/DocumentServer/logs:/var/log/onlyoffice"
diff --git a/resources/chaosknoten/onlyoffice/nginx/onlyoffice.hamburg.ccc.de.conf b/resources/chaosknoten/onlyoffice/nginx/onlyoffice.hamburg.ccc.de.conf
index 8a9a486..2471525 100644
--- a/resources/chaosknoten/onlyoffice/nginx/onlyoffice.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/onlyoffice/nginx/onlyoffice.hamburg.ccc.de.conf
@@ -3,13 +3,11 @@
 server {
     # Listen on a custom port for the proxy protocol.
     listen 8443 ssl http2 proxy_protocol;
-    listen [::]:8443 ssl http2 proxy_protocol;
     # Make use of the ngx_http_realip_module to set the $remote_addr and
     # $remote_port to the client address and client port, when using proxy
     # protocol.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 2a00:14b0:4200:3000:125::1;
-
+    set_real_ip_from 172.31.17.140;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
diff --git a/resources/chaosknoten/pad/docker_compose/compose.yaml.j2 b/resources/chaosknoten/pad/docker_compose/compose.yaml.j2
index 455caa3..70dc7e6 100644
--- a/resources/chaosknoten/pad/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/pad/docker_compose/compose.yaml.j2
@@ -3,7 +3,7 @@
 
 services:
   database:
-    image: docker.io/library/postgres:15-alpine
+    image: docker.io/library/postgres:15-alpine@sha256:64583b3cb4f2010277bdd9749456de78e5c36f8956466ba14b0b96922e510950
     environment:
       - "POSTGRES_USER=hedgedoc"
       - "POSTGRES_PASSWORD={{ secret__hedgedoc_db_password }}"
@@ -13,7 +13,7 @@ services:
     restart: unless-stopped
 
   app:
-    image: quay.io/hedgedoc/hedgedoc:1.10.3
+    image: quay.io/hedgedoc/hedgedoc:1.10.3@sha256:ca58fd73ecf05c89559b384fb7a1519c18c8cbba5c21a0018674ed820b9bdb73
     environment:
       - "CMD_DB_URL=postgres://hedgedoc:{{ secret__hedgedoc_db_password }}@database:5432/hedgedoc"
       - "CMD_DOMAIN=pad.hamburg.ccc.de"
diff --git a/resources/chaosknoten/pad/nginx/pad.hamburg.ccc.de.conf b/resources/chaosknoten/pad/nginx/pad.hamburg.ccc.de.conf
index 6c453d1..53d0a0d 100644
--- a/resources/chaosknoten/pad/nginx/pad.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/pad/nginx/pad.hamburg.ccc.de.conf
@@ -3,12 +3,11 @@
 server {
     # Listen on a custom port for the proxy protocol.
     listen 8443 ssl http2 proxy_protocol;
-    listen [::]:8443 ssl http2 proxy_protocol;
     # Make use of the ngx_http_realip_module to set the $remote_addr and
     # $remote_port to the client address and client port, when using proxy
     # protocol.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 2a00:14b0:4200:3000:125::1;
+    set_real_ip_from 172.31.17.140;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
diff --git a/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2 b/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
index dda67bb..243a468 100644
--- a/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
@@ -3,7 +3,7 @@
 
 services:
   database:
-    image: docker.io/library/postgres:15-alpine
+    image: docker.io/library/postgres:15-alpine@sha256:64583b3cb4f2010277bdd9749456de78e5c36f8956466ba14b0b96922e510950
     environment:
       - "POSTGRES_USER=pretalx"
       - "POSTGRES_PASSWORD={{ secret__pretalx_db_password }}"
@@ -15,7 +15,7 @@ services:
       - pretalx_net
 
   redis:
-    image: docker.io/library/redis:8.4.0
+    image: docker.io/library/redis:8.2.2@sha256:4521b581dbddea6e7d81f8fe95ede93f5648aaa66a9dacd581611bf6fe7527bd
     restart: unless-stopped
     volumes:
       - redis:/data
@@ -23,7 +23,7 @@ services:
       - pretalx_net
 
   static:
-    image: docker.io/library/nginx:1.29.3
+    image: docker.io/library/nginx:1.29.3@sha256:f547e3d0d5d02f7009737b284abc87d808e4252b42dceea361811e9fc606287f
     restart: unless-stopped
     volumes:
       - public:/usr/share/nginx/html
@@ -33,7 +33,7 @@ services:
       - pretalx_net
 
   pretalx:
-    image: docker.io/pretalx/standalone:v2025.1.0
+    image: docker.io/pretalx/standalone:v2025.1.0@sha256:fb2d15f11bcae8bb15430084ed81a150cfdf7c79705450583b51e352ba486e8e
     entrypoint: gunicorn
     command:
       - "pretalx.wsgi"
@@ -78,7 +78,7 @@ services:
       - pretalx_net
 
   celery:
-    image: docker.io/pretalx/standalone:v2025.1.0
+    image: docker.io/pretalx/standalone:v2025.1.0@sha256:fb2d15f11bcae8bb15430084ed81a150cfdf7c79705450583b51e352ba486e8e
     command:
       - taskworker
     restart: unless-stopped
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
index 409b5c6..165e166 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
@@ -6,27 +6,27 @@ map $host $upstream_acme_challenge_host {
     staging.c3cat.de 172.31.17.151:31820;
     ccchoir.de ccchoir-intern.hamburg.ccc.de:31820;
     www.ccchoir.de ccchoir-intern.hamburg.ccc.de:31820;
-    cloud.hamburg.ccc.de cloud.hosts.hamburg.ccc.de:31820;
+    cloud.hamburg.ccc.de 172.31.17.143:31820;
     element.hamburg.ccc.de 172.31.17.151:31820;
     git.hamburg.ccc.de 172.31.17.154:31820;
     grafana.hamburg.ccc.de 172.31.17.145:31820;
     hackertours.hamburg.ccc.de 172.31.17.151:31820;
     staging.hackertours.hamburg.ccc.de 172.31.17.151:31820;
     hamburg.ccc.de 172.31.17.151:31820;
-    id.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:31820;
-    invite.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:31820;
-    keycloak-admin.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:31820;
+    id.hamburg.ccc.de 172.31.17.144:31820;
+    invite.hamburg.ccc.de 172.31.17.144:31820;
+    keycloak-admin.hamburg.ccc.de 172.31.17.144:31820;
     matrix.hamburg.ccc.de 172.31.17.150:31820;
     mas.hamburg.ccc.de 172.31.17.150:31820;
     element-admin.hamburg.ccc.de 172.31.17.151:31820;
     netbox.hamburg.ccc.de 172.31.17.167:31820;
-    onlyoffice.hamburg.ccc.de onlyoffice.hosts.hamburg.ccc.de:31820;
-    pad.hamburg.ccc.de pad.hosts.hamburg.ccc.de:31820;
+    onlyoffice.hamburg.ccc.de 172.31.17.147:31820;
+    pad.hamburg.ccc.de 172.31.17.141:31820;
     pretalx.hamburg.ccc.de 172.31.17.157:31820;
     spaceapi.hamburg.ccc.de 172.31.17.151:31820;
     staging.hamburg.ccc.de 172.31.17.151:31820;
-    wiki.ccchh.net wiki.hosts.hamburg.ccc.de:31820;
-    wiki.hamburg.ccc.de wiki.hosts.hamburg.ccc.de:31820;
+    wiki.ccchh.net 172.31.17.146:31820;
+    wiki.hamburg.ccc.de 172.31.17.146:31820;
     www.hamburg.ccc.de 172.31.17.151:31820;
     tickets.hamburg.ccc.de 172.31.17.148:31820;
     sunders.hamburg.ccc.de 172.31.17.170:31820;
@@ -38,7 +38,7 @@ map $host $upstream_acme_challenge_host {
     eh11.easterhegg.eu 172.31.17.151:31820;
     eh20.easterhegg.eu 172.31.17.151:31820;
     www.eh20.easterhegg.eu 172.31.17.151:31820;
-    eh22.easterhegg.eu eh22-wiki.hosts.hamburg.ccc.de:31820;
+    eh22.easterhegg.eu 172.31.17.165:31820;
     easterheggxxxx.hamburg.ccc.de 172.31.17.151:31820;
     eh2003.hamburg.ccc.de 172.31.17.151:31820;
     www.eh2003.hamburg.ccc.de 172.31.17.151:31820;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
index 97e0e3c..4a449f5 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
@@ -20,16 +20,16 @@ stream {
     map $ssl_preread_server_name $address {
         ccchoir.de ccchoir-intern.hamburg.ccc.de:8443;
         www.ccchoir.de ccchoir-intern.hamburg.ccc.de:8443;
-        cloud.hamburg.ccc.de cloud.hosts.hamburg.ccc.de:8443;
-        pad.hamburg.ccc.de pad.hosts.hamburg.ccc.de:8443;
+        cloud.hamburg.ccc.de cloud-intern.hamburg.ccc.de:8443;
+        pad.hamburg.ccc.de pad-intern.hamburg.ccc.de:8443;
         pretalx.hamburg.ccc.de pretalx-intern.hamburg.ccc.de:8443;
-        id.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
-        invite.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
-        keycloak-admin.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
+        id.hamburg.ccc.de 172.31.17.144:8443;
+        invite.hamburg.ccc.de 172.31.17.144:8443;
+        keycloak-admin.hamburg.ccc.de 172.31.17.144:8444;
         grafana.hamburg.ccc.de 172.31.17.145:8443;
-        wiki.ccchh.net wiki.hosts.hamburg.ccc.de:8443;
-        wiki.hamburg.ccc.de wiki.hosts.hamburg.ccc.de:8443;
-        onlyoffice.hamburg.ccc.de onlyoffice.hosts.hamburg.ccc.de:8443;
+        wiki.ccchh.net 172.31.17.146:8443;
+        wiki.hamburg.ccc.de 172.31.17.146:8443;
+        onlyoffice.hamburg.ccc.de 172.31.17.147:8443;
         hackertours.hamburg.ccc.de 172.31.17.151:8443;
         staging.hackertours.hamburg.ccc.de 172.31.17.151:8443;
         netbox.hamburg.ccc.de 172.31.17.167:8443;
@@ -56,7 +56,7 @@ stream {
         eh11.easterhegg.eu 172.31.17.151:8443;
         eh20.easterhegg.eu 172.31.17.151:8443;
         www.eh20.easterhegg.eu 172.31.17.151:8443;
-        eh22.easterhegg.eu eh22-wiki.hosts.hamburg.ccc.de:8443;
+        eh22.easterhegg.eu 172.31.17.165:8443;
         easterheggxxxx.hamburg.ccc.de 172.31.17.151:8443;
         eh2003.hamburg.ccc.de 172.31.17.151:8443;
         www.eh2003.hamburg.ccc.de 172.31.17.151:8443;
diff --git a/resources/chaosknoten/router/nftables/nftables.conf b/resources/chaosknoten/router/nftables/nftables.conf
deleted file mode 100644
index 6d04a4c..0000000
--- a/resources/chaosknoten/router/nftables/nftables.conf
+++ /dev/null
@@ -1,79 +0,0 @@
-#!/usr/sbin/nft -f
-
-## Variables
-
-# Interfaces
-define if_net1_v4_wan = "net1"
-define if_net2_v6_wan = "net2"
-define if_net0_2_v4_nat = "net0.2"
-define if_net0_3_ci_runner = "net0.3"
-
-# Interface Groups
-define wan_ifs = { $if_net1_v4_wan,
-                   $if_net2_v6_wan }
-define lan_ifs = { $if_net0_2_v4_nat,
-                   $if_net0_3_ci_runner }
-# define v4_exposed_ifs = { }
-define v6_exposed_ifs = { $if_net0_2_v4_nat }
-
-
-## Rules
-
-table inet reverse-path-forwarding {
-    chain rpf-filter {
-        type filter hook prerouting priority mangle + 10; policy drop;
-
-        # Only allow packets if their source address is routed via their incoming interface.
-        # https://github.com/NixOS/nixpkgs/blob/d9d87c51960050e89c79e4025082ed965e770d68/nixos/modules/services/networking/firewall-nftables.nix#L100
-        fib saddr . mark . iif oif exists accept
-    }
-}
-
-table inet host {
-    chain input {
-        type filter hook input priority filter; policy drop;
-
-        iifname "lo" accept comment "allow loopback"
-
-        ct state invalid drop
-        ct state established,related accept
-
-		ip protocol icmp accept
-		ip6 nexthdr icmpv6 accept
-
-        # Allow SSH access.
-        tcp dport 22 accept comment "allow ssh access"
-
-        # Allow DHCP server access.
-		iifname $if_net0_3_ci_runner udp dport 67 accept comment "allow dhcp server access"
-    }
-}
-
-table ip v4nat {
-    chain prerouting {
-        type nat hook prerouting priority dstnat; policy accept;
-    }
-
-    chain postrouting {
-        type nat hook postrouting priority srcnat; policy accept;
-
-        oifname $if_net1_v4_wan masquerade
-    }
-}
-
-table inet forward {
-    chain forward {
-        type filter hook forward priority filter; policy drop;
-
-        ct state invalid drop
-        ct state established,related accept
-
-        # Allow internet access.
-		meta nfproto ipv6 iifname $lan_ifs oifname $if_net2_v6_wan accept comment "allow v6 internet access"
-		meta nfproto ipv4 iifname $lan_ifs oifname $if_net1_v4_wan accept comment "allow v4 internet access"
-
-        # Allow access to exposed networks from internet.
-        # meta nfproto ipv4 oifname $v4_exposed_ifs accept comment "allow v4 exposed network access"
-        meta nfproto ipv6 oifname $v6_exposed_ifs accept comment "allow v6 exposed network access"
-    }
-}
diff --git a/resources/chaosknoten/router/systemd_networkd/00-net0.link b/resources/chaosknoten/router/systemd_networkd/00-net0.link
deleted file mode 100644
index 0c55d13..0000000
--- a/resources/chaosknoten/router/systemd_networkd/00-net0.link
+++ /dev/null
@@ -1,6 +0,0 @@
-[Match]
-MACAddress=BC:24:11:54:11:15
-Type=ether
-
-[Link]
-Name=net0
diff --git a/resources/chaosknoten/router/systemd_networkd/00-net1.link b/resources/chaosknoten/router/systemd_networkd/00-net1.link
deleted file mode 100644
index ef04d04..0000000
--- a/resources/chaosknoten/router/systemd_networkd/00-net1.link
+++ /dev/null
@@ -1,6 +0,0 @@
-[Match]
-MACAddress=BC:24:11:9A:FB:34
-Type=ether
-
-[Link]
-Name=net1
diff --git a/resources/chaosknoten/router/systemd_networkd/00-net2.link b/resources/chaosknoten/router/systemd_networkd/00-net2.link
deleted file mode 100644
index 2a56f72..0000000
--- a/resources/chaosknoten/router/systemd_networkd/00-net2.link
+++ /dev/null
@@ -1,6 +0,0 @@
-[Match]
-MACAddress=BC:24:11:AE:C7:04
-Type=ether
-
-[Link]
-Name=net2
diff --git a/resources/chaosknoten/router/systemd_networkd/10-net0.2-v4_nat.netdev b/resources/chaosknoten/router/systemd_networkd/10-net0.2-v4_nat.netdev
deleted file mode 100644
index a46afb4..0000000
--- a/resources/chaosknoten/router/systemd_networkd/10-net0.2-v4_nat.netdev
+++ /dev/null
@@ -1,7 +0,0 @@
-[NetDev]
-Name=net0.2
-Kind=vlan
-
-[VLAN]
-Id=2
-
diff --git a/resources/chaosknoten/router/systemd_networkd/10-net0.3-ci_runner.netdev b/resources/chaosknoten/router/systemd_networkd/10-net0.3-ci_runner.netdev
deleted file mode 100644
index 0cd60db..0000000
--- a/resources/chaosknoten/router/systemd_networkd/10-net0.3-ci_runner.netdev
+++ /dev/null
@@ -1,7 +0,0 @@
-[NetDev]
-Name=net0.3
-Kind=vlan
-
-[VLAN]
-Id=3
-
diff --git a/resources/chaosknoten/router/systemd_networkd/20-net0.network b/resources/chaosknoten/router/systemd_networkd/20-net0.network
deleted file mode 100644
index a32d75e..0000000
--- a/resources/chaosknoten/router/systemd_networkd/20-net0.network
+++ /dev/null
@@ -1,12 +0,0 @@
-[Match]
-Name=net0
-
-[Link]
-RequiredForOnline=no
-
-[Network]
-VLAN=net0.2
-VLAN=net0.3
-
-LinkLocalAddressing=no
-
diff --git a/resources/chaosknoten/router/systemd_networkd/20-net1.network b/resources/chaosknoten/router/systemd_networkd/20-net1.network
deleted file mode 100644
index c8bffc1..0000000
--- a/resources/chaosknoten/router/systemd_networkd/20-net1.network
+++ /dev/null
@@ -1,14 +0,0 @@
-[Match]
-Name=net1
-
-[Network]
-DNS=212.12.50.158
-IPForward=ipv4
-IPv6AcceptRA=no
-
-[Address]
-Address=212.12.48.123/24
-
-[Route]
-Gateway=212.12.48.55
-
diff --git a/resources/chaosknoten/router/systemd_networkd/20-net2.network b/resources/chaosknoten/router/systemd_networkd/20-net2.network
deleted file mode 100644
index b3f497d..0000000
--- a/resources/chaosknoten/router/systemd_networkd/20-net2.network
+++ /dev/null
@@ -1,14 +0,0 @@
-[Match]
-Name=net2
-
-[Network]
-#DNS=212.12.50.158
-IPForward=ipv6
-IPv6AcceptRA=no
-
-[Address]
-Address=2a00:14b0:4200:3500::130:2/112
-
-[Route]
-Gateway=2a00:14b0:4200:3500::130:1
-
diff --git a/resources/chaosknoten/router/systemd_networkd/21-net0.2-v4_nat.network b/resources/chaosknoten/router/systemd_networkd/21-net0.2-v4_nat.network
deleted file mode 100644
index c7fd9a7..0000000
--- a/resources/chaosknoten/router/systemd_networkd/21-net0.2-v4_nat.network
+++ /dev/null
@@ -1,23 +0,0 @@
-[Match]
-Name=net0.2
-Type=vlan
-
-[Link]
-RequiredForOnline=no
-
-[Network]
-Description=v4-NAT
-
-# Masquerading done in nftables (nftables.conf).
-IPv6SendRA=yes
-
-[Address]
-Address=10.32.2.1/24
-
-[IPv6SendRA]
-UplinkInterface=net2
-
-[IPv6Prefix]
-Prefix=2a00:14b0:42:102::/64
-Assign=true
-Token=static:::1
diff --git a/resources/chaosknoten/router/systemd_networkd/21-net0.3-ci_runners.network b/resources/chaosknoten/router/systemd_networkd/21-net0.3-ci_runners.network
deleted file mode 100644
index 9caca86..0000000
--- a/resources/chaosknoten/router/systemd_networkd/21-net0.3-ci_runners.network
+++ /dev/null
@@ -1,29 +0,0 @@
-[Match]
-Name=net0.3
-Type=vlan
-
-[Link]
-RequiredForOnline=no
-
-[Network]
-Description=ci-runners
-
-# Masquerading done in nftables (nftables.conf).
-IPv6SendRA=yes
-
-DHCPServer=true
-
-[DHCPServer]
-PoolOffset=100
-PoolSize=150
-
-[Address]
-Address=10.32.3.1/24
-
-[IPv6SendRA]
-UplinkInterface=net2
-
-[IPv6Prefix]
-Prefix=2a00:14b0:42:103::/64
-Assign=true
-Token=static:::1
diff --git a/resources/chaosknoten/tickets/docker_compose/compose.yaml.j2 b/resources/chaosknoten/tickets/docker_compose/compose.yaml.j2
index 938883b..deb9f50 100644
--- a/resources/chaosknoten/tickets/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/tickets/docker_compose/compose.yaml.j2
@@ -1,7 +1,7 @@
 ---
 services:
   database:
-    image: docker.io/library/postgres:15-alpine
+    image: docker.io/library/postgres:15-alpine@sha256:64583b3cb4f2010277bdd9749456de78e5c36f8956466ba14b0b96922e510950
     environment:
       - "POSTGRES_USER=pretix"
       - "POSTGRES_PASSWORD={{ secret__pretix_db_password }}"
@@ -13,7 +13,7 @@ services:
     restart: unless-stopped
 
   redis:
-    image: docker.io/library/redis:7.4.7
+    image: docker.io/library/redis:7.4.6@sha256:a9cc41d6d01da2aa26c219e4f99ecbeead955a7b656c1c499cce8922311b2514
     ports:
       - "6379:6379"
     volumes:
@@ -25,7 +25,7 @@ services:
       backend:
 
   pretix:
-    image: docker.io/pretix/standalone:2024.8
+    image: docker.io/pretix/standalone:2024.8@sha256:110bac37efa5f736227f158f38e421ed738d03dccc274dfb415b258ab0f75cfe
     command: ["all"]
     ports:
       - "8345:80"
diff --git a/resources/chaosknoten/tickets/nginx/tickets.hamburg.ccc.de.conf b/resources/chaosknoten/tickets/nginx/tickets.hamburg.ccc.de.conf
index 9e2ca26..40882d8 100644
--- a/resources/chaosknoten/tickets/nginx/tickets.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/tickets/nginx/tickets.hamburg.ccc.de.conf
@@ -38,7 +38,11 @@ server {
 
     location = / {
         #return 302 https://wiki.hamburg.ccc.de/infrastructure:service-overview#tickets_pretix;
-        return 302 https://tickets.hamburg.ccc.de/hackertours/39c3ht/;
+        return 302 https://tickets.hamburg.ccc.de/hackertours/eh22ht/;
+    }
+
+    location = /hackertours/eh22/ {
+        return 302 https://tickets.hamburg.ccc.de/hackertours/eh22ht/;
     }
 
     location / {
diff --git a/resources/chaosknoten/wiki/nginx/wiki.ccchh.net.conf b/resources/chaosknoten/wiki/nginx/wiki.ccchh.net.conf
index 472236a..a564fc2 100644
--- a/resources/chaosknoten/wiki/nginx/wiki.ccchh.net.conf
+++ b/resources/chaosknoten/wiki/nginx/wiki.ccchh.net.conf
@@ -3,12 +3,11 @@
 server {
     # Listen on a custom port for the proxy protocol.
     listen 8443 ssl http2 proxy_protocol;
-    listen [::]:8443 ssl http2 proxy_protocol;
     # Make use of the ngx_http_realip_module to set the $remote_addr and
     # $remote_port to the client address and client port, when using proxy
     # protocol.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 2a00:14b0:4200:3000:125::1;
+    set_real_ip_from 172.31.17.140;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
@@ -22,6 +21,6 @@ server {
 
     # HSTS (ngx_http_headers_module is required) (63072000 seconds)
     add_header Strict-Transport-Security "max-age=63072000" always;
-
+    
     return 302 https://wiki.hamburg.ccc.de$request_uri;
 }
diff --git a/resources/chaosknoten/wiki/nginx/wiki.hamburg.ccc.de.conf b/resources/chaosknoten/wiki/nginx/wiki.hamburg.ccc.de.conf
index b4eab7f..ccdd224 100644
--- a/resources/chaosknoten/wiki/nginx/wiki.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/wiki/nginx/wiki.hamburg.ccc.de.conf
@@ -3,12 +3,11 @@
 server {
     # Listen on a custom port for the proxy protocol.
     listen 8443 ssl http2 proxy_protocol;
-    listen [::]:8443 ssl http2 proxy_protocol;
     # Make use of the ngx_http_realip_module to set the $remote_addr and
     # $remote_port to the client address and client port, when using proxy
     # protocol.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 2a00:14b0:4200:3000:125::1;
+    set_real_ip_from 172.31.17.140;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
diff --git a/resources/z9/waybackproxy/docker_compose/compose.yaml.j2 b/resources/z9/waybackproxy/docker_compose/compose.yaml.j2
index b6752fa..52d57df 100644
--- a/resources/z9/waybackproxy/docker_compose/compose.yaml.j2
+++ b/resources/z9/waybackproxy/docker_compose/compose.yaml.j2
@@ -1,7 +1,7 @@
 services:
   # https://github.com/richardg867/WaybackProxy
   waybackproxy:
-    image: cttynul/waybackproxy:latest
+    image: cttynul/waybackproxy:latest@sha256:e001d5b1d746522cd1ab2728092173c0d96f08086cbd3e49cdf1e298b8add22e
     environment:
       DATE: 19990101
       DATE_TOLERANCE: 730
diff --git a/roles/deploy_ssh_server_config/templates/sshd_config.j2 b/roles/deploy_ssh_server_config/templates/sshd_config.j2
index c967502..eefafa4 100644
--- a/roles/deploy_ssh_server_config/templates/sshd_config.j2
+++ b/roles/deploy_ssh_server_config/templates/sshd_config.j2
@@ -17,15 +17,7 @@ HostKey /etc/ssh/ssh_host_ed25519_key
 HostKey /etc/ssh/ssh_host_rsa_key
 HostKey /etc/ssh/ssh_host_ecdsa_key
 
-
-{% if ansible_facts["distribution"] == "Debian" and ansible_facts["distribution_major_version"] == "13" %}
-KexAlgorithms sntrup761x25519-sha512,mlkem768x25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp521,ecdh-sha2-nistp384,ecdh-sha2-nistp256,diffie-hellman-group-exchange-sha256
-{% elif ansible_facts["distribution"] == "Debian" and ansible_facts["distribution_major_version"] == "12" %}
-KexAlgorithms sntrup761x25519-sha512,curve25519-sha256@libssh.org,ecdh-sha2-nistp521,ecdh-sha2-nistp384,ecdh-sha2-nistp256,diffie-hellman-group-exchange-sha256
-{% else %}
 KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp521,ecdh-sha2-nistp384,ecdh-sha2-nistp256,diffie-hellman-group-exchange-sha256
-{% endif %}
-
 
 Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
 
diff --git a/roles/docker_compose/README.md b/roles/docker_compose/README.md
index c0a7a93..d3204ec 100644
--- a/roles/docker_compose/README.md
+++ b/roles/docker_compose/README.md
@@ -7,18 +7,17 @@ A use case for the deployment of the additional configuration files is Composes
 
 ## Supported Distributions
 
-Should work on Debian-based distributions.
+The following distributions are supported:
+
+- Debian 11
 
 ## Required Arguments
 
-- `docker_compose__compose_file_content`: The content to deploy to the Compose file at `/ansible_docker_compose/compose.yaml`.
+For the required arguments look at the [`argument_specs.yaml`](./meta/argument_specs.yaml).
 
-## Optional Arguments
+## `hosts`
 
-- `docker_compose__env_file_content`: The content to deploy to the `.env` file at `/ansible_docker_compose/.env`.
-- `docker_compose__configuration_files`: A list of configuration files to deploy to the `/ansible_docker_compose/configs/` directory.
-- `docker_compose__configuration_files.*.name`: The name of the configuration file.
-- `docker_compose__configuration_files.*.content`: The content to deploy to the configuration file.
+The `hosts` for this role need to be the machines, for which you want to make sure the given Compose file is deployed and all services of it are up-to-date and running.
 
 ## Links & Resources
 
diff --git a/roles/docker_compose/defaults/main.yaml b/roles/docker_compose/defaults/main.yaml
index 76831d6..1312972 100644
--- a/roles/docker_compose/defaults/main.yaml
+++ b/roles/docker_compose/defaults/main.yaml
@@ -1 +1,2 @@
 docker_compose__configuration_files: [ ]
+docker_compose__restart_cmd: ""
diff --git a/roles/docker_compose/handlers/main.yaml b/roles/docker_compose/handlers/main.yaml
index 2aff0fe..49e064c 100644
--- a/roles/docker_compose/handlers/main.yaml
+++ b/roles/docker_compose/handlers/main.yaml
@@ -1,11 +1,13 @@
 - name: docker compose down
-  community.docker.docker_compose_v2:
-    project_src: /ansible_docker_compose
-    state: absent
+  ansible.builtin.command:
+    cmd: /usr/bin/docker compose down
+    chdir: /ansible_docker_compose
   become: true
-
-- name: docker compose restart
-  community.docker.docker_compose_v2:
-    project_src: /ansible_docker_compose
-    state: restarted
+  changed_when: true  # This is always changed.
+- name: docker compose reload script
+  ansible.builtin.command:
+    cmd: /usr/bin/docker compose {{ docker_compose__restart_cmd }}
+    chdir: /ansible_docker_compose
   become: true
+  changed_when: true  # Mark this as always changed (for now?).
+  when: docker_compose__restart_cmd != ""
diff --git a/roles/docker_compose/meta/argument_specs.yaml b/roles/docker_compose/meta/argument_specs.yaml
index 664496e..c588ba0 100644
--- a/roles/docker_compose/meta/argument_specs.yaml
+++ b/roles/docker_compose/meta/argument_specs.yaml
@@ -2,20 +2,31 @@ argument_specs:
   main:
     options:
       docker_compose__compose_file_content:
+        description: >-
+          The content of the Compose file at
+          `/ansible_docker_compose/compose.yaml`.
         type: str
         required: true
       docker_compose__env_file_content:
+        description: >-
+          The content of the .env file at
+          `/ansible_docker_compose/.env`.
         type: str
         required: false
       docker_compose__configuration_files:
+        description: >-
+          A list of configuration files to be deployed in the
+          `/ansible_docker_compose/configs/` directory.
         type: list
         elements: dict
         required: false
         default: [ ]
         options:
           name:
+            description: The name of the configuration file.
             type: str
             required: true
           content:
+            description: The content of the configuration file.
             type: str
             required: true
diff --git a/roles/docker_compose/meta/main.yaml b/roles/docker_compose/meta/main.yaml
index cb7d8e0..b9a6980 100644
--- a/roles/docker_compose/meta/main.yaml
+++ b/roles/docker_compose/meta/main.yaml
@@ -1,3 +1,10 @@
 ---
 dependencies:
+  - role: distribution_check
+    vars:
+      distribution_check__distribution_support_spec:
+        - name: Debian
+          major_versions:
+            - 11
+            - 12
   - role: docker
diff --git a/roles/docker_compose/tasks/main.yaml b/roles/docker_compose/tasks/main.yaml
index bea3f4f..7b01304 100644
--- a/roles/docker_compose/tasks/main.yaml
+++ b/roles/docker_compose/tasks/main.yaml
@@ -59,7 +59,7 @@
     state: absent
   become: true
   loop: "{{ docker_compose__config_files_to_remove.files }}"
-  notify: docker compose restart
+  # notify: docker compose down
 
 - name: make sure all given configuration files are deployed
   ansible.builtin.copy:
@@ -70,19 +70,45 @@
     group: root
   become: true
   loop: "{{ docker_compose__configuration_files }}"
-  notify: docker compose restart
+  # notify: docker compose down
+  notify: docker compose reload script
 
-- name: Flush handlers to make "docker compose down" and "docker compose restart" handlers run now
+- name: Flush handlers to make "docker compose down" handler run now
   ansible.builtin.meta: flush_handlers
 
-- name: docker compose up
-  community.docker.docker_compose_v2:
-    project_src: /ansible_docker_compose
-    state: present
-    build: always
-    pull: always
-    remove_orphans: true
+- name: docker compose ps --format json before docker compose up
+  ansible.builtin.command:
+    cmd: /usr/bin/docker compose ps --format json
+    chdir: /ansible_docker_compose
   become: true
+  changed_when: false
+  register: docker_compose__ps_json_before_up
+
+- name: docker compose up --detach --pull always --build
+  ansible.builtin.command:
+    cmd: /usr/bin/docker compose up --detach --pull always --build --remove-orphans
+    chdir: /ansible_docker_compose
+  become: true
+  changed_when: false
+  # The changed for this task is tried to be determined by the "potentially
+  # report changed" task together with the "docker compose ps --format json
+  # [...]" tasks.
+
+- name: docker compose ps --format json after docker compose up
+  ansible.builtin.command:
+    cmd: /usr/bin/docker compose ps --format json
+    chdir: /ansible_docker_compose
+  become: true
+  changed_when: false
+  register: docker_compose__ps_json_after_up
+
+# Doesn't work anymore. Dunno why.
+# TODO: Fix
+# - name: potentially report changed
+#   ansible.builtin.debug:
+#     msg: "If this reports changed, then the docker compose containers changed."
+#   changed_when: (docker_compose__ps_json_before_up.stdout | from_json | community.general.json_query('[].ID') | sort)
+#                 != (docker_compose__ps_json_after_up.stdout | from_json | community.general.json_query('[].ID') | sort)
 
 - name: Make sure anacron is installed
   become: true
diff --git a/roles/foobazdmx/meta/main.yaml b/roles/foobazdmx/meta/main.yaml
new file mode 100644
index 0000000..386685c
--- /dev/null
+++ b/roles/foobazdmx/meta/main.yaml
@@ -0,0 +1,8 @@
+---
+dependencies:
+  - role: distribution_check
+    vars:
+      distribution_check__distribution_support_spec:
+        - name: Debian
+          major_versions:
+            - "11"
diff --git a/roles/foobazdmx/tasks/main.yaml b/roles/foobazdmx/tasks/main.yaml
index 33197b5..f6e6097 100644
--- a/roles/foobazdmx/tasks/main.yaml
+++ b/roles/foobazdmx/tasks/main.yaml
@@ -7,7 +7,11 @@
       - python3
       - python3-pip
       - python3-setuptools
-      - python3-poetry
+
+- name: Ensure python peotry is installed
+  become: true
+  ansible.builtin.pip:
+    name: poetry
 
 - name: Ensure foobazdmx user exists
   become: true
diff --git a/roles/nextcloud/templates/nginx_nextcloud.conf.j2 b/roles/nextcloud/templates/nginx_nextcloud.conf.j2
index 1beeaf3..c15a653 100644
--- a/roles/nextcloud/templates/nginx_nextcloud.conf.j2
+++ b/roles/nextcloud/templates/nginx_nextcloud.conf.j2
@@ -4,7 +4,6 @@
 server {
     # Listen on a custom port for the proxy protocol.
     listen 8443 ssl http2 proxy_protocol;
-    listen [::]:8443 ssl http2 proxy_protocol;
     # Make use of the ngx_http_realip_module to set the $remote_addr and
     # $remote_port to the client address and client port, when using proxy
     # protocol.
diff --git a/roles/nftables/README.md b/roles/nftables/README.md
deleted file mode 100644
index 81d8871..0000000
--- a/roles/nftables/README.md
+++ /dev/null
@@ -1,11 +0,0 @@
-# Role `nftables`
-
-Deploys nftables.
-
-## Support Distributions
-
-Should work on Debian-based distributions.
-
-## Required Arguments
-
-- `nftables__config`: nftables configuration to deploy.
diff --git a/roles/nftables/handlers/main.yaml b/roles/nftables/handlers/main.yaml
deleted file mode 100644
index 3b72c54..0000000
--- a/roles/nftables/handlers/main.yaml
+++ /dev/null
@@ -1,5 +0,0 @@
-- name: Restart nftables service
-  ansible.builtin.systemd_service:
-    name: nftables
-    state: restarted
-  become: true
diff --git a/roles/nftables/meta/argument_specs.yaml b/roles/nftables/meta/argument_specs.yaml
deleted file mode 100644
index aa56223..0000000
--- a/roles/nftables/meta/argument_specs.yaml
+++ /dev/null
@@ -1,6 +0,0 @@
-argument_specs:
-  main:
-    options:
-      nftables__config:
-        type: str
-        required: true
diff --git a/roles/nftables/tasks/main.yaml b/roles/nftables/tasks/main.yaml
deleted file mode 100644
index 46ea18d..0000000
--- a/roles/nftables/tasks/main.yaml
+++ /dev/null
@@ -1,15 +0,0 @@
-- name: ensure nftables is installed
-  ansible.builtin.apt:
-    name: nftables
-    state: present
-  become: true
-
-- name: deploy nftables configuration
-  ansible.builtin.copy:
-    content: "{{ nftables__config }}"
-    dest: "/etc/nftables.conf"
-    mode: "0644"
-    owner: root
-    group: root
-  become: true
-  notify: Restart nftables service
diff --git a/roles/ola/meta/main.yaml b/roles/ola/meta/main.yaml
new file mode 100644
index 0000000..386685c
--- /dev/null
+++ b/roles/ola/meta/main.yaml
@@ -0,0 +1,8 @@
+---
+dependencies:
+  - role: distribution_check
+    vars:
+      distribution_check__distribution_support_spec:
+        - name: Debian
+          major_versions:
+            - "11"
diff --git a/roles/systemd_networkd/README.md b/roles/systemd_networkd/README.md
deleted file mode 100644
index 3297c47..0000000
--- a/roles/systemd_networkd/README.md
+++ /dev/null
@@ -1,11 +0,0 @@
-# Role `systemd_networkd`
-
-Deploys the given systemd-networkd configuration files.
-
-## Support Distributions
-
-Should work on Debian-based distributions.
-
-## Required Arguments
-
-- `systemd_networkd__config_dir`: Directory with systemd-networkd configs to deploy.
diff --git a/roles/systemd_networkd/meta/argument_specs.yaml b/roles/systemd_networkd/meta/argument_specs.yaml
deleted file mode 100644
index 81b046a..0000000
--- a/roles/systemd_networkd/meta/argument_specs.yaml
+++ /dev/null
@@ -1,6 +0,0 @@
-argument_specs:
-  main:
-    options:
-      systemd_networkd__config_dir:
-        type: path
-        required: true
diff --git a/roles/systemd_networkd/tasks/main.yaml b/roles/systemd_networkd/tasks/main.yaml
deleted file mode 100644
index f88ed14..0000000
--- a/roles/systemd_networkd/tasks/main.yaml
+++ /dev/null
@@ -1,14 +0,0 @@
-- name: ensure rsync is installed
-  ansible.builtin.apt:
-    name: rsync
-    state: present
-  become: true
-
-- name: synchronize systemd-networkd configs
-  ansible.posix.synchronize:
-    src: "{{ systemd_networkd__config_dir }}"
-    dest: "/etc/systemd/network"
-    archive: false
-    recursive: true
-    delete: true
-  become: true